That’s a lot of land and a lot of fire. The smoke is reaching down into the contiguous 48, which means it is much worse at the source. The near-term issues are the typical fire-fighting and recovery actions. The long-term issues deal with the uncertainties around melted permafrost. Climate change has been melting permafrost, possibly creating the craters in Siberia. The fires create carbon dioxide, which is bad enough. After the fires have passed, the thawed land will release more as decomposed material is unlocked from underground ice. This may set off a feedback cycle that hasn’t been accounted for in climate change predictions, probably quickening the rise of atmospheric greenhouse gases.